Caracteristics Of Nitrogen Loss And Research On Reduceing Nitrogen Loss During The Process Of Waste Disposal In Large Scale Farm

In order to provide provide a scientific basisfoe the rational fertilization of poultry and animal feces ang farm waste pollution control,we combined with the existing research resuls to discuss the scale pig farm waste in thre shed,accumulation and high temperature composting,anaerobic fermentation ahd zhaoye stores nitrogen loss.we got the situation of th whole cycle back nutrient use ang loss of the agricultural circulation system with animal waste collected from the field.The main research of this thesis is as follows:?we statisticaled the quantity f basis farms' faeces and urine output.we statisticaled the amount of eight months,fresh pig manure ang its use of the project and the dosage of each project.? we calculated the pigs'N excretion,compared the contrast of the feed inlet total nutrient and excrete nutrient.?we evaluated the N losses of the waste collection from three aspects of different cleaning comparison,different dry cleaning waste method under the condition of nightsoil waste recovery.? we evaluate the N loss in the process of dung heap from the three aspects of the temperature change in the processof the piles,the other party in the processes of ammonia volatilization rate and loss of ammonia,ammonium nitrogen and nitrate nitrogen.?we evaluate the N loss in the process of manure composting from the three aspects of the Changes from the composting temperature,moisture content,total N and C/N ratio.Based on the comprehensive the analysisof the data,we know that the nitrogen loss is about 20%?35%in the process of cleaning out the cell and animal manure.In the temporary accumulation unit,the amplitude of the poultry and animal feces is large(0.1%?60%).It really affected the nitrogen utilization of the subsequent link.In the process of resource utilization,the drop nitrogen loss was about 36%.Besides,anaerobic fermentation do better than high temperature aerobic compost in keeping the nitrogen in the animal feces.In Zhao Ye storage unit,total nitrogen and ammonium nitrogen content did reduce the amount of nitrogen significantly in farmland.About 6%?80%of nitrogen in the livestock excrement can use after the loss of nitrogen in each unit.Conclution:In order to realize the sustainable development,we must established and improved the environmental risk assessment and early warning mechanism,we developed ecological animal husbandry and aquaculture.